My 2018 G80 Sport 3.3T ( (9.2-inch HD navigation system with DIS Multimedia Controller) has NOT malfunctioned since my SiriusXM Data subscription (Travel and Traffic) expired last Friday. The issue happened consistenlty after 5->10 minutes. I drorve the car all day that Friday and several times since and not had the issue re-occur. I'm am 92.8% confident the issue is resolved in my car.
I was told by Mapnsoft, Hyundai is currently temporarily revoking the SiriusXM data subscription for affected users/cars. MapnSoft had submitted a request to SXM to unsubscribe my vehicle from SXM Data last Tuesday. I'm not sure if my my SXM Data subscription expired or was unsubscribed. Regardless, the car and the SXM website shows my SXM data subscription is no longer active as of Friday Feb 19, 2021.
I speculate revoking the SXM data subscription for affected cars is a temporary measure until a navigation system update is made available to resolve the issue. I've heard rumors/hearsay Hyundai/Genesis will be extending the SXM data subscriptions for affected users by 3 months.
Serendipitously, I was driving through local Hyundai/Genesis dealer (checking out new G's

) Friday Feb 19, 2021 when my the SXM Data subscription was revoked/expired. I saw a message on car screen indicating subscription was being updated. It subsequently initiated a software update without input from me (odd). I also spoke with the dealer service manager. He had heard nothing/nor gotten reports from customers about this issue.
Vehicle
2018 G80 Sport (9.2-inch HD navigation system with DIS Multimedia Controller)
Subscriptions
Audio:
SiriusXM All Access 1-Year Special Offer End Date: 05/01/2021
Infotainment:
Trial EndED: 02/19/2021
Expired Subscriptions
Complimentary 3-Year Trial SiriusXM Travel Link
Complimentary 3-Year Trial SiriusXM Traffic
Current Navigation update running
14.10 Release date Nov 23, 2020
I've done 4 previous updates with no issues.
SD-Card from Mapnsoft
MODEL / MODEL YEAR: 2018 G80 (9.2-inch HD navigation system with DIS Multimedia Controller)
PART NUMBER: 1411SP2_DHPE (This is printed on the Mapnsoft provide SD card).
Information from vehicle DIS/head unit/Navigation system.
This information is accessible under Home\Setup\System Info\Version (page 147 of 2018 G80 of DIS-NAV manual)
Model: DHBS.P2ALC.NA
S/W VER. : DH PE USA SOP.01.013
I-BOX VER.: PR-DH-NA E400 20201006
MAP VERSION: NAM.13.47.50.610.001.3
NAVI Application: PR2.NAM.HMC.201022.1001
Gracenote SDK VER.: 5.6.2.44
Gracenote DB VER.: NA[5804]